Casting machine



Oct. 6, I Y T. A. MIXON CASTING MACHINE Filed Feb. 18, 1924 2 Sheets-Shave?. l

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yTHOMAS A. I IIXON, '0F DETRUIT, MICHIGAN.

CASTING MACHINE.

Application led February-18, 1924. Serial' No. 683,599.

' dinally extending To all whom it mayconcem:

Be it known that I, vTrroizuis A. MrxoN, a citizen of the vUnited States of America, residing at'D'etroit, in the county of Wayne and State of Michigan, have invented cer# tain new and useful Improvements in Gasting Machines, of which the following is a l a specification, reference being had therein to the accompanying drawings.

This invention relates generally to appa ratus 'for makingcastings and refers more particularly to machines for casting dental.

fillings of the type known One of the essential vention is to provide a mac e of this t in which a valve casingis provided wi a support that will be moved vertically automatically to seat the head of the casing upon a' flask vcontainilig''the mold when the support has beenmoved horizontally to a position above the flask.

Another important object is to provide simple and effective means for raising the support' for the valve casing to unseat the head from the flask and forsubsequently moving the support laterally with respect to then flask so thatthe head will be moved out of the Away when not in use. A further object is -to provide an eilicient and practical machine in which the valve controlling the passage of the fluid under pressure to the head is opened automatically when the head is seated upon the liask and is closed automatically when the head is un'- seated from the iask.

With the above and other objects in view the invention consists in certaln novel as V inlay fillings.

Y features ofconstruction, combinations and rations 8 that communicatewith a longituarrangement of parts as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawin f Figure 1 is a sectional elevatlon of a machine embodying my invention;

Figure 2 -is a perspective view thereof; Figure 3' is a top lan view thereof.

The numeral 1 esigua-tes abase-upon which is mounted a sectional mold support 2 and. a standard 3, The up -sect1on'4 .Tof the mold support is provid with an annular recess 5 in the upper end thereof for receiving a tubular Piask 6. containing the mold 7 and is provided withl centralperfo# ob'lets of thev 1n.

its upper end with a horiaontally the' free end t 'head 38 of the screw 1 passage 9. The lower section 10 is provided at its upper end with an annular recess 11 forreceiving a reduced 4annular portion 12 of the upper section 4' 'and 1s also provided with centralperforavtions 13 that communicate with the passage .9 and with a longitudinally extending' passage 14. The lower section is positioned upon the base by means'of a tubular pin 15 which engages a vertical opening 16 in the base and which is rovided at its upper end with an annular ange 17 that fits within the paage 14 at'the lower end .thereofl The standard 3 is preferably provided 'a' extend a cylindrical rtion '19 a ereof in whic a vertical spindle 20 is rigidly secured Mounted on the spindle 2 0 for swinging and sliding movement is a horizontal arm 21 having a handleportion 22 at the free end thereof. Projecting laterally from the lower end of the hub portion 23 of the 'arm 21 is a subelbow 18 havin lstantially rectangular` shaped lug 24 that slid-ably engages gagement with the cylindrical` portion 19 fof the elbow there is a coil spring 25 that is arm 21 -andfa nut 26 portion 2 3 of the the upper portionof threadedly engaging the spindle.

Projecting downwardly from the arm 21 intermediate the ends thereof is a valve casiilg 27 that is preferably formed of two t escopically arranged sections 28 and 29 respectively. The u per section 28 threadedly engages'the wa ls of arm 21 and is provided with a conical valve seat 31 while the lower section 29 preferably fits within the upper section and is provided at its lower end with a flanged hea ing an annular oove 33 in the lowerface thereof in ywhi'c is mounted, lan annular packing' 34 adapted to engage'theupper edges of the flask-@ G- to form an air tight Joint 32 havbetween the parts. The lower sect1on sleeved upon the spindle 2O between the hub l a recess 30 in the 29 is preferably connected to the upper section 28 by means of a screw 3'5 that threadedly engages the apertured upper end 36 of the lower section and extends freely throu h a passage 37 in theupper'section 28. T e

ubtantially frustoconical in shape andaforms a valve member for engagement with the seat 31. A coil spring 39 is sleeved upon the lower section 29 between the head 32 and the lgwer end of the upper section 28 and normally retains the valve 38 in engagement with the seat 31.

Connected to a transversely extending passage 40'in the arm 2l is a tube 41 through whichc compressed air may be conveyed from asuitable source of supply to the recess 30. A suitable pressure regulator 42 is preferably connected to the tube 41 for controlling the pressure of air passing therethrough while a suitable gauge 43 is preferably connected to a vertical passage 44` in the arm 21 for indicating the pressure of air supplied to the recess 30.

In order that the head 32 at the lower end ofthe valve casing may be lowered into sealing engagementwith the flask 6 andmay be centered properly upon the flask when in lowered position, there is a vertical slot 45 in the upper end of the cylindrical portion 19 .of the standard elbow for receiving the lug 24 when the arm 21 is positioned over l the mold support. When the lug 24 enters the slot the spring 25 will' force the arm downwardly and in view of the fact this downward movement of the arm is greater than the distance between the head 32 and the upper edges of the flask 6, thedownward movement of the arm 21 will cause the annular packing 34 in the head 32 to seat firmly upon the upper edges of the flask to seal the joint between the head 32 and flask and will also cause the upper section 28 of the valve casing to compress the spring 39 against the head 32 so as to unseat the valve 38- thus permitting compressed air to pass freely through the valve casing from v the recess 30 to the flask 6.

retain the head 32 in engagement with the flask 6 until the upper section 28 of thev valve casing is raised sovthat the valve -seat 31 is moved linto engagement with the valve 38'to cut olf the supply 'of air from the recess 30 to the flask 6. The head 32 will then be lifted clear of the flask 6 beforel the arm 21 is swung laterally.

In use, a pattern of the inlay is first formed t by placing wax directly into the cavity to be filled so as to secure lthe contour of the cavity, the pattern is then supported on one end of a suitable sprue former that is atymeans such as a blow torch tached at its other end to a cover of a flask.

- This flask is subsequentl lled with plastic material that correspon s to the usual sand in ordinary molding and after being per.- mitted to stand for a short time the cover yand sprue former are removed leaving -a crucible shaped depression and a communif eating sprue in the plastic material used for suitable burner so as to melt the pattern to form the mold and is subsequently placed upon the mold support 2 of the casting machine as shown in Figure 2of the drawings.

After positioning the flask upon the support, a mass of metal of the desired size and material is placed in the Crucible shaped depression and is. melted by some suitable (not shown). The horizontal arm 21, normally in the position shown in Figure 2 ofthe drawings, is then swung over the mold support so that the lug 24 will enter the slot 45 whereupon the spring 25 will force the arm 21 downwardly, thereby causing the head 32 to'seat upon the flask 6 and also causing Athe valve 38 to be unseated s0 as topermit compressed air to enter the flask to force the molten metal into the cavity formed by the wax pattern. Any' gases that are generated with the result of the compressed air contacting with the molten metal in the flask Vwill be forced downwardly through the'ap'ertures and passages in the sections 4 and 10 rethe mold. The flask is then placed over a spectively of the support 2 and will escape through the tubular pin 15 and opening 16v in the base.

After the inlay has been formed the supply of compressed air may be cut off and the head 32 ma be removed from the flask 6 by moving the lever 46 so that the cam portion 47 thereof will lift the lug 24 out of the slot 45 and will subsequently swin the arm 21 laterally so that the head 32 will e moved away from the flask. l

Should it be desired to vary the pressure of the head 32 upon the flask, the nut 26 may be readily adjusted upon the spindle 20 to vary the tension of the spring 25. Likewise, the operation of the valve 38l may be varied by adjusting the screw 35 in the lower section 29 of the valve casing.

What I claim as my invention is 1. In a'casting machine, the combination with a flask, ofmeans for supplying air un` der pressure tothe flask, including a valve casin having a head adapted to seat upon the ask, and a support for the casing mounted to move horizontally and vertically whereby the head may be moved over the flask and dropped to seat upon the flask.

U2. In a casting machine, the combination with a flask, of a valve casing having a head adapted to seat on the flask, a movable sup-' port for the valve casing, yieldable means adapted to move thesupport -to seat the-head tension of said .horizontal movement,

a slot adap swun upon the spindle,

ing air ing a valve casing secured to said memberand having a head adapted 45' with a standard the standard for both vertical and .horizontal and means for varying the yieldable means to'. vary the pressure of the head u n said flask.

3. In'a casting mac ine, the combination' with a flask and a standard, of ali arm mounted on the standard for `vertical and. a valve Acasing secured to the arm and having a head adapted to seat 'on the flask, a lug, said standard having d to receive the lug when the head carried b y upon' the ilask,

for movingth'e arm vertically when the lug registers with the slot to seat the head upon 'theask 4. In a casting machine, the combination with a standard, of a spindle carried by the standard, an arm mounted on both swinging and slidn movement, a lug upon the,arm, adapted to receive the lug whenv the arm is a yieldable member for sllding the arm upon the spindle when the lug registers with the slot,.and a lever pivoted on the standard and having a cam portion engpgeable with the lug to disengage the sanie om the slot and swing the arm about the spindle.

5. In a casting machine,- the combination with a standard, of a spindle carried by the standard, an arm mounted on the spindle for both swinging and'slilding movement, a lug upon the arm, said standard having. a slot adapted to receive swung upon the spindle, and means-for shiling the arm uponV he spindle when the lug registers with the slot, v i

6. In a castin machine, the combination with a flask an a' standard, of a `member mounted onv the standard for both horizontal and vertical movement, means .for sup lyunder pressure to said iask,`inc udto seat uponv the Hask, means for moving the member horizontally to osition the head above the ila-sk, and means or moving the member vertically when the head is over .the flask to seat the said head onthe flask.v

7. In a casting machine,

' of a member mounted the combination movement, means for moving the member means for moving direction when the same reaches a predetermined point -during its horizontal movement, moving the member posite direction and forsubscquently moving the same' horizontally.

8. In 'a casting. machine, the combination with a standard, of a member mounted on vthe standard for both vertical and horizontal movement, means for moving the lmember horizontally, means fonmovmg the member Y horizontal movement, an

movement, means the arm 1s moved horlzontally to a position above the flask, and means the spindle for the lug when the arml is.

the member' and a single meansfof'adapted to'seat upon .the as vertically in the op- -i vertically in one' direction Vwhen, the same reaches a predetermined, y,int during its- 'cam operated means for moving the member vertically in the opposite direction andfor subsequently moving` the same horizontally.y

9. In a casting machine, the combination with a'standard, of a member mounted on the standard for both vertical and horizontal for movingf-the member 'la horizontally, means for movin the member vertically 1n one direction w en the same reaches a predetermined.. point during .its horizontal movement, and a cam for moving n the member vertically in the opposite direction and for subsequently moving the same horizontally. l

10. In a casting machine, the combination with a flask, of avalve casing having ahead 'said stan ard having a. SlQtggngageable with the'flask, a supportfor the 85 valvecasing-mounted to move horizontally -and vertically, means for supplying a fluid .under pressure to the support, a valve in the casing for controlling the passage of thel fluid from the support to the flask, means '90 for moving the support horizontally to position' the head above the flask, means for moving the support vertically when the head is above the ask to seat the. said head on the flask, and means when the support is moved vertically.

1L In a casting machine, th'e combination with a standard, of a spindle carried by the standard, an arm mounted von the spindle, a lug upon the arm, the standard havin a slot to receive the 1u ,an adjustable mem er on the4 spindle, an a coil s ring sleeved upon the spindle 'between t e adjustable member-and arm. 1

12. In a casting machine, with a standard,.of a horizontally swingable arm mounted -onthe standard, said arm havf ing a recess, a valve casing-secured to the lwalls'of the recess, and means for supplying a lfluid under pressure tosaid recess.

- 13. In a castingmachine, the combination with a flask, of a valve casing having ahead adapted to seat upon the flask, a support for the casing adapted to movehorizontally and vertically, means for m -ving the support 115 horizontally to position the' head above the flask, and means for automatically seating the'head upon the flask when the head is above thelask.

14, In a casting machine, with a flask, of a valve casin having a head a support lfor Y to move horizontally and for moving the support the casing adapted vertically means horizontall to position the headabove flask, a yie dable member for automaticall seating the head upon the 'flask when the head is `above theiiask, and means for moving the support verticallytoun'seat the head fromthe flask and for` subsequently swing'' .150

for actuating the valve 95 the combination the lcombi-nation 1 20' the 12.5 f

' carried by one section and engaging a seat in theothe'r section, and means located between one section and the head of the other section for normally retaining said valve in engagement with its seat.

16.- In a casting machine, the combination with a flask, of a valve casing having a head adapted to seatupon the flask, a support for the casing adapted to move horizontally and vertically, means for moving the support horizontally to position the head above the flask, means for moving the support vertically in one direction to seat thehead upon the flask, means for moving the support vertically in the opposite directions to unseat the head from the flask and for subsequently swinging the support horizontally to move the head away from the flask, and a valve in the casing adapted to be opened when the support is moved vertically in one direction and adapted to be closed when the support is movedvertically in ythe opposite direction. f Y

17. Ilr a casting machine, the combination with a flask, of a valve casing having a head adapted toseat upon the flask, a sup- 4 port for the casing adapted to move horizontal'ly and vertically, said support having a passage in communication with the casing, means for. supplying a fluid under pressure to the passage in thev support, a valve normally seated in the casing for cuttingx off' the supply of fluid to the flask,

means for moving the support horizontally to position the head above the flask, means for moving the support vertically in one direction to 'seat the head upon the flask, meansfor'unseating the valve when the head is seated on the flask,'and means for moving the support vertically in the opposite direction to seat the valve in the casmg and un\ seat the head from the flask. f

18. In a casting machine, the combination with a flask, of avertically movable casing adapted to seat upon the flask, said casing having va passage for supplying air vunder pressure `to the flask when said casing is seated thereon, a horizontally movable support for the casing having a passage incommunication with the passage aforesaid, and means for supplying a fluid under pressure to the last mentioned passage. v

19. In a casting' machine, 'the' combination with av flask, of a 'vertically movable casingi adapted to seat upon the flask, said casing having'a passage for supplying air under pressure to the flask when said easing is seated thereon, a movable support for said casing having a passage in x,communication with the passage aforesaid, means for supplying a fluid under pressure to the second passage, and means in one of said passages v. for controlling the supply of fluid to said flask. i

20. In a casting machine, the combination With a flask, of means for supplying air under pressure to the ask, including a valve casing having a head engageable With the flask,A and a valve in the casing for controlling the supply of air to the flask, a horizontally and vertically movable support for the valve casing, means for moving the support horizontally toposition the head above the flask, means for moving the support vertically when the head is above the flask vto seat the said head on theflask, and means for actuating the valve when the support is moved vertically.

2l. In a casting machine the combination with a standard and a flask, of an arm mounted on the standard for both vertical andhorizontal movement, a casing carried by the arm adapted to seat upon the flask, means for moving the arm horizontally to position the casing over the flask, means for moving thearm vertically in one direction to seat the casing upon the flask, and means .formo-ving the arm vertically to unseat the casing andl subsequently move the same laterally of the flask.

22. In a casting machine, the combination -with a standard anda flask, ofil an arm mounted on the standard for both vertical and horizontal movement, a casing carried by the arm adapted to seat upon the flask, means for moving the arm horizontally to position the casing over thecflask, meansfor moving the arm vertically in one direction to seat the casing upon the flask, and cam operated means for moving the arm vertically to unseat the casing and subsequently move the same laterally of the flask.

.23. In a castingmachine, the combination with a standard and a flask, of a horizontally swingable arm mounted on the standard having a passage therein, means `for supplying air under pressure to the passage, a casing carried by the arm in communicas tion withthe passage, means for seatingfthe casing upon the flask, and means in said casing for admitting air under pressure from the passage in thefarm to the flask when the casing is seated.

24. Ina casting machine, the combination with a flask containing a mold having la cavity, and a depression in communica` tion with the cavity adapted to receive molten metal, of means for forcing the molten metal from the"depression into the cavity including a horizontally movable casing adapted 1to seat upon the flask, and having a passage/ adapted to communicate with the depression aforesaid, and means for supplying ainunder pressure to the passage in the casing.

251v In acasting machine, the combination with a flask containing a mold having a cavity, and a depression in communication with the (cavity adapted to receive molten metal, of a closure for the flask having g means for conveying a iiuid under pressure i 3o cally in one direction to seat the casing upon the I support is moved/ vertically.

the combina@ `for controlling the suppl to the depression in' the mold to force the molten metal from the depression into the cavity, a standard, and a support 4for said closure 'mounted to move horizontally .and

vertically upon said standard.

26. In a casting machine, the combination with aiiask containing a mold -having a cavity, and a depression in communication with the cavity adapted to receive molten metal, of a caslng adapted to seat upon the flaskhaving a'passag'e adapted to communicate with the depression aforesaid, means for supplying air under pressure to the passage in the casing, a standard, a support for said casingV mounted to move horizontally and `vertically upon' said standard, means for moving said support horizontally in one direction to position the casing above. the ask, means for. moving the supportvertithe iiask, and a single means for moving the support vertically the opposite direction tounseat the casingl and .subsequently move the support horizontally to swing the .casing laterally with respect to the ask.'

27. In a casting machine, the combination with a flask, of a casing adapted to seat upon the flask, ofa support for the casing mounted to move .vertically and horizon.- tally, means for moving the lsupport horizontally to position the casing above the Amilask, means for moving the support vertically tovseat' the casing upon the flask, and

va common means for moving the sup ort verticallyto unseat the casing and su equently move the support horizontally to swm Slie casmglaterally with respect to 28. In a casting-machine, the combination with a flask, of a casing adapted to seat l upon the ask, vmeans for supplying air under pressure to the casing, a valve member casing, a support for. sa1 .casing mounted to move holylzontaly and vertically, and means for actuating lsaid valvewhen said 29. Ina casting machine, tion with, ailas'k, of a valvecasing mounted for movement into and-out of'operative relatlon with the flask, and means for automatically eiiecting2 engagement between of air to' said the flask and 'casing when operative relation between the vparts has been established.

30. In a casting machine, the combination with a flask, of a valve casing mounted for horizontal movement relative to the flask, and means for automatically seating the casing upon the ask after it has been lioilled horizontally intoalignment with the 31. Ina casting machine, the combination with afflask, of a valve casing mounted for both horizontal and vertical movement relative to the flask, and means forv automatically moving the casing vertically.

to seat the same upon the -flask after the said casing has been@ moved horizontally into alignment with the flask.

32. In a casting machine, the vcombination with a flask, of means for supplying air under pressure to the iiask including a valve casing mounted for movement into and out of operative relation with the flask, a valve in the casing controlling the passage of air therethrough, means for automatically seating the casing upon the ask when operative relation between the casing and iask has been established, and means for automatically actuating the valve to permit air under pressure to thev flask when the casing is seated upon the flask. 33. In a casting machine, the combination with a iiask, of means for supplying air under. pressure to the' iiask including a valve casing mounted for both horizontal andvertical movement, means for moving controlling the passage and means for4 automatwhen the casing upon the flask when in alignment therewith, and a single'means for unseating the casing from the flask and for sublequently moving the same laterally of the ask.

35. In a casting machine, the combinationwith a flask, of means for supplying air under pressure to. the flask including a valve casing mounted for bothhorizontal and vertical movement with respect to said flask.

'In testimony whereof I ailix my signature.

i THOMAS A. MiXoN. 

